<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model="name" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model="age" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="gender">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="add">添加/修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0">
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item, index) in arr" :key="index">
          <td>{{ index + 1 }}</td>
          <td>{{ item.name }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.gender }}</td>
          <td>
            <button @click="del(index)">删除</button>
            <button @click="edit(index)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      arr: [
        { name: "Tom", age: "19", gender: "男" },
        { name: "Jone", age: "21", gender: "女" },
        { name: "小李", age: "18", gender: "男" },
      ],
      name: "",
      age: "",
      gender: "",
      flag: false,
      hao: "",
    };
  },
  methods: {
    add() {
      if (this.name === "" || this.age === "") {
        alert("有数据为空，记得加数据");
        return;
      }
      if (this.flag === true) {
        // console.log(this.hao)
        this.arr[this.hao].name = this.name;
        this.arr[this.hao].age = this.age;
        this.arr[this.hao].gender = this.gender;
        this.flag = false;
      } else if (this.flag === false) {
        this.arr.push({
          name: this.name,
          age: this.age,
          gender: this.gender,
        });
      }
      (this.name = ""), (this.age = ""), (this.gender = "");
    },
    edit(id) {
      (this.name = this.arr[id].name),
        (this.age = this.arr[id].age),
        (this.gender = this.arr[id].gender);
      this.flag = true;
      this.hao = id;
    },
    del(id) {
      this.arr.splice(id, 1);
      (this.name = ""), (this.age = ""), (this.gender = "");
    },
  },
};
</script>
